ATF Explosives Detection Canines are certified and trained by ATF to find explosives and firearms-related evidence. The K-9's nose is a major asset, making them capable of detecting up to 19,000 explosives combinations. A major advantage in using the K-9 is their mobility. Their duties include working side by side with Federal agents and local police officers to seek out explosives, guns and spent ammunition evidence in violent crime investigations. In addition, they secure major public events, schools, and Federal buildings, worldwide by searching for explosives in the areas.